4 Channel Matrix Mixer Amplifier with Mp3 T-4120MP RMS 4×120W, 4 channel Matrix Mixer Amplifier with mp3 Features: * Four channel amplifier in a 3U 19"rack mount design. * All source inputs could be matrix assigned to different 4 zones outputs simultaneously. * The 5 channel inputs & Mp3 input are designed with separate bass, treble and volume control. * Three microphone/line inputs with phantom power and gain control. * Two aux inputs by RAC with gain control. * Mp3 player with SD and USB inputs, separate power supplied module. * Built in Tuner audio source. * One 4 zone remote microphone input by RJ45 port. * Four channel line inputs and speaker outputs. * Versatile speaker outputs for each four channels: 70V, 100V and 4Ω. * A RS232 serial control port for third party system communication. * A priority input to override other inputs (equal to EMC input). * Input priority level from high to low: Before short circuit priority input : MIC 1>TEL>Remote. MIC>MIC2= MIC3=LINE4=LINE5=MP3 After short circuit priority input : TEL>MIC 1>Remote. MIC>MIC2= MIC3=LINE4=LINE5=MP3 Built-in monitor with volume control. * Extensive protection of thermal, short-circuit, clip and overload with indicators. * With ground lift switch.